The present invention relates to a process for the manufacture of paraffinic hydrocarbons, which can be used as gasoline blending components. Provided are a charge-pump booster circuit section for boosting an external power voltage in absolute value level, a boost-voltage feedback section for controlling the booster circuit section, and a clock buffer section. The universal rake ridge cap can be cut so that the arcuate surface will tangentially intersect the stepped surfaces of rake members to provide an aesthetically pleasing transition from rake board to universal rake-ridge cap to rake board.